Turret-lathe.



Patnted D ec. 26, I899..

- N. H. FAY.

TURRET LATHE.

(Application filed Nov. 2, 1899.)

(No Model.)

Illlll g1 imm! PATENT Fries.

NORMAN H. FAY, on DEXTER, MAINE.

TURRET-LATH E.

SPECIFICATION forming part of Letters Patent No. 639,892, dated December26, 1899. Application filed November 2, 1899. Serial No. 735 .567. Nmodel.

To ctZZ whom it may concern.-

Be it known that I, NORMAN H. FAY, a citizen of the United States,residing at Dexter, in the county of Penobscot and State of Maine, haveinvented certain new and useful Improvements in Turret-Lathes; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

My invention relates to lathe-turrets of that class comprising a slidewith a turret rotatably mounted thereon and provided with a handle-leverfor turning it into several positions and locking mechanism for lookingit there.

The object of my invention is to construct a turret in which by a singlebackward-andforward movement of the handle-lever the turret is unlocked,turned one movement and locked, and I also make provision for clampingthe turret by a further movement of the handle-lever.

The invention consists of the combination and arrangement of partshereinafter set forth and claimed.

I illustrate my invention by means of the accompanying drawings, inwhich- Figure 1 is a vertical section on the line y 3 of Fig. 3. Fig. 2is a side elevation of the turret. Fig. 3 is a horizontal section on theline X X of Fig. 1. Fig. 4 is a plan or top View with the handle-leverin section. Fig. 5 is a side elevation of the turret-lockin g bolt, andFig. 6 shows two views of the cam.

A represents the slide on which the turret is mounted and which may beused on any form of lathe. On the slide is an upright hollow stud F,having a screw c cut on its lower end, by which it is secured to theslide. On the lower end of the turret is secured the ratchet-ring R, arecess being formed in the slide to receive it. This ring has internalratchet-teeth r, by which the turret is turned, and externallocking-notches r, by which it is locked.

The turret is locked by means of a lockingbolt It, contained in a casingH, secured'on the top of the slide at the base of the turret by bolts t.The bolt h is mounted to slide horizontally, and it has a spring a whichtends to hold it in engagement with the notches r.

The bolt is released by the action of a cam G, which is secured to thelower end of a vertical rod E, journaled in the hollow stud F. As hereshown, the cam has an inner portion 9 which lies inside audon a levelwith the ring R, and an outer portion g which ex -tends under the ringand is adapted to act on the end of the bolt h, the latter being madesufficiently thick to project below the under surface of the ring,whereit has a rounded surface. (Shownin dottedlines, Fig. 3.) The outer edgeof the cam is so formed that as it turns it acts on the lower edge ofthe end of the bolt and pushes it back out of the locking-notches.

The turret is turned by the pawl g, which engages the notches of theinternal ratchet when the handle-lever is pulled forward. The pawl ispivoted to the cam G and is provided with a spring 9 It will beunderstood that the notches g and r are spaced the same as the workingfaces of the turret.

The turret is turned by means of a handlelever K, which is adapted toengage and disengage with a disk 0 on the upper end of the rod E. Thelever Kis here shown as secured to 01' forming part of a ring B, whichis interposed between the disk 0 and the top of the turret. The lever ismade to engage the disk 0 by means of the notches a, formed in the edgeof the disk, and with these notches the end of the lever-locking boltengages. The bolt 10 is contained in arecess in the handlelever and isforced normally against the disk by a spring 7c. The bolt may bewithdrawn from the notch c and the lever released from the disk by athumb-latch it. Two notches are here shown in the edge of the disk, sothat the handle may be used in two difierent positions, according to theconvenience of the operator.

The ring to which the handle-lever is secured has within and concentricwith it a nut D, which is provided with a screw-thread which engages ascrew-thread on the upper end of the stud F. The ring is prevented fromturning freely on the nut by a set-screw b, which clamps them together.

position to another, the set-screw is loosened, and when set up the ringand the nut actprac- I00 When the handle is to be shifted from one'tically as a single part for clam ping the turret I after the samehasbeen set in position. The nut is so adjusted that a slight movementof the handle-lever after it is released from its notch and disconnectedfrom the disk and the mechanism which turns the turret will set the nutand clamp the turret in place.

From the above description it will be evident how the turret operates.

In order to shift the turret from one workin g face to the next inorder, the handle-lever is thrown back, this movement causing the cam torelease the locking-bolt h. The pawl g will then snap into the nextnotch back. As the lever is brought forward the turret is turned untilthe next notch comes opposite the end of the locking-bolt, when thisbolt snaps in and holds it fast. The thumb is now pressed on thethumb-latch 7a and the lever disconnected from the disk and theturretturning mechanism, and a further forward movement tightens the nutand clamps the turret firmly on the slide. The lever is left in thisposition until the next shift is to be made, when it is snapped backinto the position shown in Fig. 4. During the backward motion of thelever the nut D becomes loosened, but there is sufficient vertical playto the parts to allow this.

The turret is comparatively simple in construction and it is controlledentirely by the movements of the handle-lever. v 7

It will he understood that the turret can be fitted for holding four,six, or any reasonable number of tools and that the ratchet-ring will beprovided with the same number of notches both inside and outside as theturret has working faces.

I claim 1'. In a lathe-turret, the combination of a slide, a hollow studthereon, a turret adapted to turn on said stud, a ratchet-ring on thelower end of the turret having an internal ratchet and externallocking-notches,a springactuated locking-bolt adapted to engage saidnotches, a rod extending through said hollow stud having on the lowerend thereof a cam adapted to throw said locking-bolt out of engagementwith said notches, a pawl pivoted to said cam and adapted to engage saidinternal ratchet and a handle connected with the upper end of said rodfor turning the same. I

2. In a lathe-turret, the combination of a slide, a hollow stud thereon,a turret adapted to turn on said stud, a ratchet-ring on the lower endof the turret having an internal ratchet and external locking-notches,aspringactuated locking-bolt adapted to engage said notches, a portion ofsaid bolt extending below the under surface of said ring, a rodextending through said hollow stud, having on the lower end thereof acam, said cam having a portion extending beneath said ring and adaptedto throw said locking-bolt out of engagement with said notches, a pawlpivoted to said cam and adapted to engage said internal ratchet and ahandle connected with the upper end of said. rod for turning the same.

3. In a lathe-turret, the combination of a slide, a hollow stud thereon,a turret adapted;

to turn on said stud, a ratchet-ring on the lower end of the turrethaving an internal ratchet and external locking-notches, a rod extendingthrough said hollow stud having on the lower end thereof a cam adaptedto throw said locking-bolt out of engagement with said notches, a pawlpivoted to said cam and adapted to engage said internal ratchet, a screwformed on the upper end of said stud, a nut fitting said screw, ahandle-lever secured to said nut and means for connecting anddisconnecting said handle-lever with the upper end of said rod.

4. In a lathe-turret, the combination of a slide, a hollow stud thereon,a turret adapted to turn on said stud, a ratchet-ring on the lower endof the turret having an internal ratchet and external locking-notches,aspringactuated locking-bolt adapted to engage said notches, a rodextending through said hollow stud having on the lower end thereof a camadapted to throw said locking-bolt out of engagement with said notches,a pawl pivoted to said cam and adapted to engage said internal ratchet,a screw formed on the upper end of said stud, a nut fitting said screw,a

handle-lever secured to said nut, a notched disk on the upper end ofsaid rod and a springactuated bolt in said handle-lever for engagingsaid disk.

5. In a lathe-turret, the combination of a slide, a hollow stud thereon,having a screw formed on its upper end a turret adapted to turn on saidstud, a rod journaled in said stud and connecting at its lower end withmechanism for turning and locking the turret, a nut adapted to engagesaid screw, aring outside of said nut, a set-screw for clamping themtogether, a disk on the upper end of said rod above said nut havingnotchesin the edge thereof, a handle-lever secured to said ring, alocking-bolt in said handle-lever adapted to engage said notches andmeans for retracting said locking-bolt.

In testimony whereof I affix my signature in presence of two witnesses.

NORMAN II. FAY.

Witnesses:

G. M. SAWYER, A. II. KNIGHT.

IIO

